Xena: Warrior Princess star Lucy Lawless is fighting the fight for Greenpeace and is now facing three years in prison, RadarOnline.com has learned.

The actress pleaded guilty on Thursday for a February trespassing charge when she and five other environmental activists sat atop a drilling tower in New Zealand for four days in protest against Arctic oil exploration.

“We want to tell [those responsible for deep-sea oil drilling] absolutely under no circumstances is this a good idea. They are robbing our children of their birthright to a clean and healthy planet, and they know it.”

Lucy is a first-time offender in what was a peaceful protest so many expect she’ll escape the three-year jail sentence.